我尝试更多上传图片但它提供错误,即使我尝试更多

Can anyone help me I am facing problem while uploading image.

PHP

<?php
    $msg="";
    $db=mysqli_connect("localhost","root","root","man");
    if(isset($_POST['submit'])) {
        $fileName=$_FILES['uploadfile']['name'];
        $fileTmpName=$_FILES['uploadfile']['tmp_name'];
        $folder='images/';
        move_uploaded_file($fileTmpName,$folder.$fileName);

        $sql=mysqli_query($db,"INSERT INTO manimages(image) VALUES ($fileName)");
   }
?>

HTML

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <meta http-equiv="X-UA-Compatible" content="ie=edge">
        <title>Uploading Images</title>
    </head>
    <body>
        <form action="" method="POST">
            <input type="file" name="uploadfile">
            <input type="submit" name="submit" value="upload image">
        </form>
   </body>
</html>

Error is Notice: Undefined index: uploadfile in C:\wamp64\www\ftest\index.php on line 5 and Notice: Undefined index: uploadfile in C:\wamp64\www\ftest\index.php on line 6

Your form tag is incomplete, for uploading images it should look like:

<form action="" method="post" enctype="multipart/form-data">

Remember if you are using file upload control, you must set enctype to multipart/form-data

To allow forms to upload files, you should specify the right enctype attribute, by default it's application/x-www-form-urlencoded which you should change it to multipart/form-data.

Try this:

<form action="" method="POST" enctype="multipart/form-data">

Now you can access the PHP superglobal variable $_FILES, thus no undefined index error will be thrown.